Horizontal pot type burner



Dec. 18, s PERRY HORIZONTAL POT TYPE BURNER Filed March 18, 1944 Jzawiqg Ferry which do not form Patented Dec. 18, 1945 HORIZONTAL POT TYPE BURNER Stanley Perry, Chicago, 111., assignor to 011 Devices, Santa Fe, of Illinois N.'Mex., a limited partnership Application March 18, 1944, Serial No. 527,067 4 claims. 'c1. 15s-91) This invention relates to an improvement in horizontal pot type burners and has for one object to provide an improved means for subjectingthe fuel oil in liquid form to the heat of combustion, in order to vaporize the fuel. 7

Another purpose is to provide improved means for providing air to a horizontalpot type burner.

Another purpose is to provide improved means for varying or controlling the flow of air in such a burner.

Another purpose is to provide improved means for supplying excess air at certain times in the use of a burner, when excess air is particularly necessary.

Other purposes will appear from time totime in the course of the specification.

The present application covers material disclosed in co-pending application Serial No. 480,450, filed March 25, 1943, and owned by the present assignee.

The invention is illustrated more or less diagrammatically in theaccompanying drawing, wherein:

Figure 1 is a vertical axial section and Fig. 2 is a side elevation on a reduced scale with an electric circuit diagrammatically illustrated.

Figure 3 is a bottom plan view of the fuel cup illustrated in Figure 1.

Like parts are indicated throughout the specification Referring to the drawing:

I indicates generally any suitable heater structure or flame-receivingmember, the details of part of the present invention. It is provided with an aperture 2 for admitting the flame and exhaust gases of the bumer.- Secured to the member 2 is any suitable tertiary air box, generally indicated asa cylindrical housing 85, provided with a delivery lip 86, defining an annular passage 81, aligned with the aperture 2. The outer side of the tertiary airbox 85 is closed by a flame ring 5, having a circumferential flange 6 and a flame aperture 11, generally axially aligned with the aperture 2 and the passage 81. Secured to the flame ring -is an outer housing 10, herein shown as generally cylindrical and having a bottom 11 with an axial aperture 12. Located within" the housing Ill, and generally co-axial therewith, is the pot member 13, having a bottom 14, provided with a double bottom member 23, aligned with afan 24,

by like numbers and drawing.

. adapted to be driven by a motor 25, mounted on a support 26 secured to a ring or plate 21, which, in turn, is secured to the housing 10.

bottom or end ll of the a 28 are battles extending lo'ngitudi- 55 nally'in the space between the outer housing In and the pot 13; The pot is provided with a plurality of primary air inlet apertures l5, located at various distances iromthe ends of the Dot. 16 indicates a row of secondary air inlet apertures located adjacent the end of the pot closest to the flame ring 5. The secondary air inlet,

apertures 16 may be inclined toward the. flame aperture ll of the ring 5. The bailie 22 may be employed to direct air from the topmost row of primary air inlets toward the partly open end of the pot and thus across the secondary'air inlets 16. j

In describing the structure shown in the drawing, it will-be understood that it is particularly adapted for use in a horizontal burner inwhich the axis of the pot is horizontal. However, the

' pot axis may be substantially inclined in relapassage 81.

tion to the horizontal, and when theterms top or upper are employed in connection'with the pot, it will be understood that they relate to the right-hand end of the pot in the position in which it is shown in Fig. 1. Similarly, the member ll may be described as the closing end or the bottom of the pot.

When the structure is employed in connection with a horizontal burner as shown in the present drawing, a cup 15 may be positioned in the pot. In the particular form shown, a unitary structure is employed, in which the cup is provided with downwardly extending flanges "and 811, a circumferential horizontal flange 16, a forwardly and an upwardly extending tending through the aperture 11 and'into the The cup assembly thus shown may be secured in positionby a screw-threaded pipe 31, positioned bya securing nut 38. 39 is aspacer in the space between the housing 10 and the pot I3. 34 is a sump member in communication with the connection 31. Extending from it is a liquid which carries liquid fuel from any suitable fioat' chamber or valve assembly 3|. Fuel may be supplied to'the float chamber 31 by any suitable means, not herein shown, from any suitable liquid fuel source. 7

In order to light .thefuel in the cup 15, there is provided a spacing ring 48 in the wall of the pot l3, aligned with an aperture in the housing I0. During combustion the closure 'plugifl, 5|, closes the aperture defined by'the member 48. A' chain 52 prevents loss of v the plugY50. When the plug 50, 51, is removed, amatch can be dropped into the cup 15.

Air is admitted to the space within the hous- This *beak structure is shown as e;

ing ill through the aperture l2. The inflow of air can be increased by operation of the fan 24. Air is admitted to the tertiary chamber 85 through a bottom passage 88, which may be controlled by a shutter 89, pivoted as at 90. The shutter, in turn, may be positioned from the float chamber 3| by a structure including a bell crank lever 95 and a connecting link 95a, The bell cranklever is pivoted as at 96, and its opposite arm is connected to the oil flow control member 32b. Its position is controlled by the manual control knob 32a. In operation the tertiary air supply means is controlled in unison with the manual control of the now of oil to the 7 burner. When the control member this set to provide a relatively low flow of'oil, the motor circuit, which includes the motor'25, may be broken. As shown in Fig. 2, this circuit includes a conductor 25a and a rheostat 25b; when the control knob 32a is set at the pilot or low fire stage, current does .not.pass throughthe conductor 25a to actuate the motor 25. When the knob 32a is moved toward the high flre or large flow position, electric power to' energize the motor 25 is allowed to pass through the circuit 25a. At the same time, the rotation of the con- }trol knob .321), which may be set to rotatein unison with the knob 32a, actuates the shutter 89 and varies the supply of air admitted through the space 88 to the passage 81.

It will'be' realized that whereas there is herein described and shown' a practical and operative device, nevertheless many changes may be made in. the size, shape, number and disposition of parts. It will be particularly understood that the specific circuit employed and th'especiflcconnection between the oil flowcontrol and the tertiary air inlet control may be widely varieda- It ,is found practical, howeven to provide a simultaneous control of the air supplying motor 25, the 5 oil flow controlling member band the tertiary air controlling shutter 89 Whi1e thev structure is most advantageousin connection with ahorizontalburner, its application is not limited to a horizontal burner.

. It will be realized, therefore, that the descrip- 7 tion and drawing should be taken as in a broad sense illustrative and diagrammatic,

The use and operation of the invention are as follows: 7 o

In the present burnenwhich is of the hydroxilating type, primary airis delivered to the interior of the. pot l3 through primaryv air inlet apertures I5. The device may employ natural draft, or the Ian 24 may be used to cause air to .flow into the pot. .the bottom of thecup along the fuel pipe 33. .Once cqmbustion has been initiated, the fuel is A liquid fuel is delivered to vaporized by the heat of combustionin or adjacent the pot, and the vaporized hydrocarbon 'mingles with the primaryjair to produce a' pri-r mary, partially combustible mixture. Thismixture is directed, either under natural dr'aft,,or by the fan 2, through the-central aperture of the flame ring 5 and into the interior of the member i. At high fire, a flame is delivered horizontally to a substantial distance. The cup is adequately heated by combustion going on about it, and vaporization of the fuel is efiiciently maintained.

The secondary air needed to produce the final combustible mixture is delivered through the apertures 'l 6 andthrough'the upper or inner row of apertures I5, within the deflector 22. As the secondary air joins with the primary mixture, a completely combusible-mixture is formed, and

the flame of this combustible mixture extends into the interior of the'member l. The passage 88 of the base member 85 serves for the admission of additional tertiary air, which prevents smoking and completes the combustion of all or substantially all of the carbon delivered into the interior of the member I.

At the lower stages of combustion, a much smaller rate of flow is maintained to the cup ll.

, for complete vaporization and the less volatile portions of the fuel must be consumed or reduced to a powder or light ash. This is particularly the case when; relatively heavy fuels, such as Diesel oil, are burned. I i

At the high flre stage, tertiary air may. advantageously be admitted for passage into the housing 85 and thence to the stove l. The inflow of the tertiary airis controlledby the shutter 83. This shutter, inturn, is controlled by the manipulation of the manual control members 32a or 32b. It will :be observed that when the rate of flow of liquid fuel is increased above a certain point, the motor 25 is cut in. and at the same time the supply of tertiary air is in creased. i The rheostat may also be employed;as a speed control meansfor the-motor. i The greater the rate of flow of the fuel, the greater will be the speed of the motor, and the greater will be the volume of inflow of tertiary air.

Iclaim: I 1. In a pot type burner, a pot having a circumferential wall with a plurality of primary air inlet apertures, :a vaporizing cup located within said pot, means for directing a flow of liquid fuel to the cup, va control means for varying the rate of flow of liquid fuel to the cup, means for delivering secondary air adjacent the mouth of the pot, additional means for delivering tertiary air to the mixture of vaporized fuel primary and secondary air, including a tertiary air chamber adjacent the mouth of theipot, said chamber having a circumferential tertiary air delivery aperture, means for controlling the flow of air into said tertiary air chamber and means for coordinately controlling said: tertiary airflow controlling means and said fuel flow controlling means." a,

2. In a pot type :burne'r, a pot having a circumferential wall with a' pluralityof primary air inlet apertures, a= vaporizing cup located' within said pot, means for directing a flow of liquid fuel to the cup, a'control means for varying the rate of flow of liquid fuel to the cup, means for delivering secondary 'air adjacentthe mouth of pot, additional means for delivering tertiary air to the mixture of vaporized fuel primary 'and secondary air, including a tertiary air chamber adjacent the mouth of the pot, said chamber having a-circumferentialtertiary air delivery aperture, means for controlling the flow of air into said tertiary air chamber, an outer housing surrounding said pot, motor'means for delivering air to the space between said housing and pot, and means for coordinately controlling said tertiary air flow controlling means and said fuel'flow controlling means and the operation of said motor.

3. In a pot type burner, a pot having a circumferential wall with a plurality of primary air inlet apertures said ot having means for admitting secondary air, a vaporizing cup located within said pot, means for directing a flow of liquid fuel to the cup, a control means for varying the rate of fiow of liquid fuel to the cup, means for delivering tertiary air to the mixture of vaporized fuel primary air and secondary air, including a circumferential tertiary air chamber adjacent the mouth of the pot, said chamber having a tertiary air delivery aperture, means for controlling the flow of air into said tertiary air chamber, an outer housing surrounding said pot, motor driven means for delivering air to the space between said housing and pot, and means for coordinately controlling said tertiary air flow controlling means and said fuel flow controlling means and the operation of said motor, including a unitary control element, an operating connection between said unitary control element and the tertiary air flow controlling means, an operating connection between said unitary control element and said fuel flow controlling means, a circuit for said motor, a rheostat in said circuit, and means for actuating said rheostat in relivering secondary air adjacent the mouth of the pot, additional means for delivering tertiary air to the mixture of vaporized fuel primary air and secondary air, including a circumferential tertiary air chamber adjacent the mouth of the pot, said chamber having a tertiary air delivery aperture, means for controlling the flow of air into said tertiary air chamber and means for coordinately controlling said tertiary air-flow controlling means and said fuel flow controlling,

means, includinga unitary control element, an operating connection between said unitary control element and the tertiary air flow controlling" means and an operating connection between said unitary control element and the fuel flow co'ntrol means.

STANLEY PERRY.

said unitary control ele- 

